Deprecate ensureProductionSettings()

[derrabus]

Doctrine does not provide its own cache implementation anymore and relies on the PSR-6 standard instead. As a consequence, we cannot determine anymore whether a given cache adapter is suitable for a production environment.

The corresponding functionality has always been error-prone. For instance if cache adapters are decorated, the orm:ensure-production-settings command would not complain anymore. By adopting PSR-6, this gets even harder because we would need to have internal knowledge of any PSR-6 compatible library a user might potentially use.

Moreover, I really don't think that we should offer this kind of inspection and therefore propose to remove it.

[norkunas]

This also was checking for:

if ($this->getAutoGenerateProxyClasses()) {
    throw ProxyClassesAlwaysRegenerating::create();
}

and not only the cache :)

[derrabus]

I see. Is this enough to keep that method, if we removed all cache checks? Do you use that method or the command?

[norkunas]

Was in backlog sometime ago to use it 🙈 not sure if it's needed because doctrine-bundle has a recipe which configures this for me :) Just wanted to point it out :)